new camaro owner and i just can't seem to see where this goes,,pic attached,,this is not my engine but a pic i found that shows what i need to know on mine right now there is a hose connected to it but with a bolt plugged into itand i know it has to go somewhere but my vacuum diagram doesn't show this hose

 

anybody

 

goes to the brake booster. the small hose connection on it goes to the heater switch vacumm hose that comes out of the wireing harness.